<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
  </head>
  <body>
    <script>
    let day = prompt('请输入星期几')
    if(day === '星期一'){
      document.write('Monday')
    } else if(day === '星期二'){
      document.write('Tuesday')
    }else if(day === '星期三'){
      document.write('Wednesday')
    }else if(day === '星期四'){
      document.write('Thursday')
    }else if(day === '星期五'){
      document.write('Friday')
    }else if(day === '星期六'){
      document.write('Saturday')
    } else if(day === '星期日'){
      document.write('Sunday')
    } else {
      alert('喝假酒了吧，没有这个星期，叫你少喝点假酒，不听，脑子不够用了吧。哈哈哈哈哈哈哈哈哈哈哈')
    }
  </script>
  </body>
</html>